Automatic nut gun



Dec. 10, 1946. J. KLOP OVIC AUTOMATIC NUT GUN Filed Aug. 15, 1944Patented Dec. 10, 1946 UNITED STATES PATENT OFFICE 2,412,275 AUTOMATICNUT Gun Joseph Klopovic, Euclid, Ohio Application August 15, 1944,Serial No. 549,525

7 Claims. 1

This invention relates to wrenches, and more particularly to magazinewrenches adapted for use in the rapid assembly or disassembly of partssecured by bolts or nuts associated with threaded studs and adapted toaccommodate a plurality of such nuts.

An object of the present invention is to provide a tool of the characterindicated, so constructed that in the application of a nut to a bolt orthreaded stud the nut can be driven home and properly seated withoutregard to whether the bolt or stud projects beyondthe outer face of thenut without any possibility of the bolt threading into the next adjacentnut in the magazme.

A further objector the invention is to provide a tool of the typeindicated adapted to feed the supply of nuts forwardly in properalignment and without possibility of jamming in the tool.

Further objects will appear in the course of the following detaileddescription.

, The invention consists in the novel construction, arrangement, andcombinations of parts hereinafter more particularly described andclaimed.

One sheet of drawings accompanies this specifica'tion as part thereof,in which like reference characters indicate like parts throughout.

In the drawingi Figure 1 is a longitudinal medial cross section throughthe improved tool; a

Figure 2 is a fragmentary, enlarged scale, medial longitudinal crosssection through the forward end of the..tool, showing the forward nut inengagement with a bolt; and

Figure 3 is a transverse cross section taken on line 33 of Figure l.

Referring to the drawing, the tool comprises a barrel I having one endclosed by a cap 2 threaded or otherwise secured on the end of thebarrel, the cap 2 being rigidly associated with a clutch member 3 ofconventional design, the Other member 4 of the clutch being adapted tobe connected to a flexible rotary drive shaft by means of which thebarrel I may be rotated on its 1ongitudinal axis as desired.

A cylindrical hand clasp 25 is rotatably mounted on the forward end ofthe barrel and secured against longitudinal motion thereon as by a pin23 having its inner end engaging an annular groove 21 in the barrel 1.From the foregoing, it will appear that the tool may be held by theoperator by means of a freely rotatable sleeve or hand grip 25 adjacentits forward upper end and directed toward a bolt as desired, while therotati-on of thebarrel can be readily controlled by.

the'clutch member 3.

Adjacent. the closed end of the barrel a restricted bore 6 is providedas by a suitable bushing'5 and in the bore 6 is slidably located theenlarged end 8 of a'guide rod 9 axially positioned with respect to thebarrel l. spring ill is enclosed between the cap 2 and the enlarged head8 operating to force the guide rod 9 toward the open end of the barrelI.

Within the barrel I is positioned a spiral spring,

31 circling the guide rod 9, therear end of spring 31 bearing againstbushing 5 and the forward end of the spring 3| bearing against afollower having a hub 29 slidable on guide rod 9, this extending slots2| cut in the outer face of the barrel.

Normally the tool with a supply of nuts in the magazine occupies theposition illustrated in Fi ure 1 with the balls 23 resilientlyrestraining the passage of the outermost nut.

To prevent the bolt or threaded stud from picking up more than theoutermost nut, the guide rod 9 has its forward end provided with a borein which are seated two spacedsprings l2 having their rear ends securedto guide rod 9 as in slots provided in a bushing l I. The forward freeends of the springs l2 are turned outwardly and formed as threadgrippers |3--l3 extending" tnr'ougnradial holes I'4--l4 adjacent theforward endo'f the guide rod 9. The forward bore of the guide rod isclosed as by cap l5 screw threaded into the bore, this cap l5 having acentral hole to slidably receive the stem I! which has upon its rear enda cam member I8 and upon its forward end a bolt engaging face plate IS.A spiral spring 29 is interposed between the bolt engaging plate [9 andthe forward end of the cap [5 tending normally to force the plate I9forwardly and thus retract the cam I8 from between the spring membersl2, thus permitting the thread grippers I3--l3 to retract within theguide rod 9 and release the adjacent nut. In operation, as the bolt Bthreads through the outermost nut its end will contact the plate l9 andforce the cam member I8 rearwardly, thus pressing the springs l2 apartand forcing the gripper members l3-I3 A compression.

. 3 into locking engagement with the threads of the next adjacent nut tothe rear, thus locking said next adjacent nut with respect to the guiderod 9 and holding that nut and all other nuts in the magazine inposition. When the plate I9 has been forced back to its limit, theoutermost nut will be forced forwardly against the pressure of balls- 23until properly seated.

The inner bore of thebarrel I will, of course, be shaped to cpn'f'ormwith the contour ,of the 'n uts: to be used andsizedtopermit the nutssliding freely within the bore upon the guide rod 9. To

bolt or stud, the outer end of the bore of barrel I can slide, a springpressed follower slidable on said may be tapered slightly inwardly asindicated at 33 so as to permit a rocking of the rear-end of theoutermost nut to facilitate its engagement with the bolt threads.

Various modifications-in the mechanical form and 'co'nstruction'of' thevarious parts will readily suggest themselves to those skilled in theart but all within the scope of the present invention as claimed.

Having thus described my invention, I claim:

1. A magazine wrench comprising a barrel, means Within the barrel toforce nuts therein to- Ward an open end of the barrel, means at saidopen' end to resiliently retain the outermost nut and nut-gripping meanswithin the barrel having an operating part normally positioned withinthe bore of the outermost nut arranged to bexengaged by the end of abolt threading through said outermost nut toiactuate the nut grippingmeans to ,lock in position the next adjacent nut and occlude the boltfrom said next adjacent nut; f I

2. The device of'claim 1 is which thenut engaging-means operated by theentering bolt comprises nut'gripping members and the operating partthereof comprises a slidable member having a bolt engaging face andmeans for forcing thenut gripping members into .engagementwiththeadjacent nut to lock the nut in position and limit the movement of theslidable member.

3; "Ihe'idevice' of claiml' in which the nutengagingmeans operated bythe entering bolt-'com-- prises oppositely disposed spring memberssecured by their rear-ends to a centering member and,

having their forward free ends outturned to .en-

gage the threads of an adjacent. nut, associated? with'a slidable memberhaving a cam shaped part adapted to force the free ends of the springme'mbers apart and a bolt engaging face directed toward the openrend ofthe barrel.

4; The device of. claim 1 in which the nut engaging means operated bythe enteringboltcomprises oppositely disposed spring members securedfacilitate the application of the tool in situations axial guide toengage the innermost nut, oppositewhere it cannot be held in truealignmentwith the: "1 13'. disposed spring fingers secured to a forwardpart of the axial guide, the forward ends of said fingers bent outwardlyto form thread engaging parts, a member slidable in the forward end ofthe axial guide having a rearwardly directed cam part adapted to presssaid spring fingers apart and a forwardly directed bolt engaging face'ofa size to occlude an entering bolt from a nut opening. I 6. A magazinewrench comprising a barrel having an open end, an axially disposedslidablev guide member within the barrel on which nuts 7. A magazinewrench comprising an open ended barrel, means adjacent the open end toresiliently restrain the passage of nuts therethrough, a slidableaxially disposed guide within the barrel, spring means biasing the guidetoward the open end of the barrel, a follower slidable on the guide,spring means'biasing the follower to--' ward the open end of the barrel,spring fingerscarried by the guide having their free forward endsoutwardly bent to form thread engaging members, a slidable membermounted on the forward end of the guide formed with a rearwardlydirected cam partadapted to wedge the spring fingers into nut engagingposition and a forwardly directed 'bolt engaging face,

spring meansvbiasing the slidable member into nonoperative position, 'ahand ,grasp freely. ro-

JOSEPH KLOPOVIC."

